Rotary valve



March" 16 1926. 1,576,668

J. l. MAY

ROTARY VALVE Filed-April 30, 1925 Patented Mar. 16, 1926.

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RGTfARY VALVE.

Application filed ,April 30,A 1925. :Serial .Nzo. 26,3982.

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,Be it known that l, .laines 1. MAY, a citi` zen of the United States, and resident of Niles, .in (the county .of Trmnbiill and State of Ohio, have invented icertai-n new and riseiful .Improvements in Rotary Valves, of which the following is a :specilication My present invention-'.-ielates to impro-ve- .inents in rotary valves for internal combostion engines., and aims gto ,provide a construction in which leakage of duid past the valve will loe prevented withont fendue friof tion. j

Their-ivention further aim-s to provide in connection with 4a :rotary `cylindrical valve having a periph-eral port, :a-eoactiirg member having .a gas passage, which .member will `be held in contact ywith the valve with requisite pressure, but willv be prevented from any movement away from the valve, and will be self-adjusting to .take up wear.

With these .and other objects in view, which will hereinafter appear,-the invention includes the nov-el features yof construction and arrangement and Ycombi-nation ofparts lhereinafter describe-d and particularly detined bythe appended claims.

An embodiment of my invention is illustrated .in the racco-mgianyi-ng drawings, in whichz- Y Figure 1 is a transverse vert-calsection through the upper portion of an `engine cylinder with its associated. inlet :and exhaust valves. y

Fig. .2 is aperspective :detail 'of :one .of the valves, and j i j j Fig. 13 is a horizontal section through the valve and .its casing.

While in this dra-wing I have ,shown .only

a Asingle .cylinder it will -.be readily .apparent that 'asmany cylinders .may be provided as desired, this Vinvolving mere duplication or multiplication.

Referring by reference characters to this drawing, the numeral 1 designates the engine cylinder containing the customary piston 2 and provided on opposite sides with inlet and exhaust valves 3 and 1 respectively, which are rotatably mounted in valve chambers formed in part by lateral projections 5 and 6 of the cylinder, and in part by lateral projections of the detachable cylinder head 7.

The valves and cylinder are cooled by water chambers 5a, 6a, and the cylinder head is also provided with a water -space 7 a, which Water spaces may be connected with the usual circulatory system .in the manne-r well understood those :skilled inthe art.

Valve casting or casing v.5 h-as the .usual intake connection .5", `and valve casing .6 the customary exhaust connection 6"..

. The valves are of cylindrical formation and Aas those on the inlet ,and exhaust .sides and their cooperating parts are duplicates .of each other, a .description of -one will fsuttice. j Each valve y3, :for example 2)v `has 1a port .3? in one end communicating lJoy a curved passage witha peripheral port 3".

The valve casing is provided with a space or `chani'her adjacent theend lof the valve carryingpthe ,port 3%, with which .space the intake pipe communicates, the same being true as .to the `exhaust valve.

The peripheral port 43a is adapted to cooperate with a tubularpacking member 8, having its .lower edge curved to'conforni to the yperiphery of .the valve, such member 18 being slidably guided .in the cylinderhead, preferably in the manner hereinafter .described, and having .a fclosed upper end 18?., and a lateral port 8b lcooperating with .the port .or passage- 7 X in the cylinder Jhead leading to the combustion chamber thereof `The cylindrical chamber within which .the meinber 8 is located is extended upward as Vindicated at T? and is provided with a closure member 9 preferably connected thereto by screw threads .as shown. Closure member .9V has .a threaded opening .in Yits upper end through which passes a hollow adjusting screw `l0 which may bel locked in adjusted position by locking or set screw 11.

The packing member 8 has a stem 8c ex tending upward from the closed upper end` 8EL thereof,the upper end lof fthe stem'being threaded and extending into the hollow screw 10. A nut 12 is screwed` onto the threaded portion of the stein and bears against the lower end of the screw 10.

A helical spring 13 surrounds the stem,

the upper end of the spring being fast to Supposing now that there is any looseness due to wear for example on the edge of member 8 bearing on the valve, the spring will rotate nut 12 and tend to screw the same upward on the stem, but as upward movement of nut 12 is prevented by the lower end of screw 10 the member 8 will be moved down until arrested by its contact with the valve. I thus provide an automatically or selfadjusting ported packing member which cannot be unseated by pressure of gases due to back liring, or the like.

Preferably I provide an auxiliary packing sleeve 14 between member 8 and its guide member 7b, which sleeve has its lower edge shaped to conform to the surface of the valve and is pressed yieldingly towards the same by spring 15, as by the use of two sleeves. In this manner I secure a more flexible contact with the valve surface, but the outer sleeve may be omitted where desired.

A detachable cap 16 is preferably provided for the upper end of the tubular or guide part 7b.

I prefer to provide packing rings 8d and 14d in connection with members 8 and 14, to guard against leakage.

The valves may, of course, be operated in the customary or anyl desired manner in proper relation to the piston movement, but as the operating means forms no part of the present invention, illustration and description thereof is deemed unnecessary.

Having thus described my invention, what I claim is 1. In an internal combustion engine, theV combination with the cylinder, of a valve casing, a rotary ported valve therein, there being a passage leading from the valve casing to the cylinder, a ported packing member located in said passage, means for positively holding said packing member in contact with the valve, and means for automatically adjusting said holding means to tak-e up wear.

2. In an internal combustion engine, the combination with the cylinder, of a valve casing, a rotary ported valve therein, there being a passage leading from the valve casing to the cylinder of substantially L-shape, a packing member in the shape of a hollow cylinder having a closed upper end and a lateral port, means for positively holding said packing member in contact with the v Valve, and means for automatically adjusting said holding means to take up wear.

3. In an internal combustion engine, the combination with the cylinder, of a valve casing, a rotary ported valve therein, there being a passage leading from the valve casing to the cylinder, a threaded spindle carried by the packing member, a nut on the spindle bearing against an abutment member, and a spring tending to rotate the nut.

4l. In an int-ernal combustion engine, the combination with the cylinder, of a valve casing, a rotary ported valve therein, there being a passage leading from the valve casing to the' cylinder, a threaded spindle carried by the packing member, a nut on the spindle bearing against an abutment member, and a coiled spring encircling the spindle and having its ends connected respectively to the spindle and nut.

5. In an internal combustion engine, the combination with the cylinder, of a valve casing, a rotary ported valve therein, there being a passage leading from the valve casing to the cylinder, a threaded spindle carried by the packing member, a nut onthe spindle, an adjustable abutment member supported from the cylinder and receiving the thrust ofv said nut, and spring means tending to rotate said nut.

6. In an internal combustion engine, the combination with the cylinder, of a valve casing, a rotary ported valve therein, there being a coacting passage leading from the valve casing to the cylinder, a cylindrical ported packing sleeve within said passage, a spring tending constantly to press said sleeve towards the valve, a ported packing member within said sleeve, means for positively and non-yieldingly holding said packing member pressed against the valve, and means for automatically adjusting said holding means to take up wear.

In testimony whereof, I affix my signature.

JAMES IVEN MAY. 

